<template>
  <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>用户列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片试图 -->
      <el-card>
        <el-row>
          <el-col>
            <!-- 添加角色按钮区域 -->
            <el-button type="primary">添加角色</el-button>
          </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
          <!-- 展开列 -->
          <el-table-column type="expand">
            <template slot-scope="scope">
              <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                  <!-- 渲染一级权限 -->
                <el-col :span="5">
                  <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级和三级权限 -->
                <el-col span="19">
                  <!-- 通过for循环，嵌套渲染二级权限 -->
                  <el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id">
                    <el-col :span="6">
                      <el-tag type="success"  closable @close="removeRightById(scope.row, item2.id)">{{ item2.authName }}</el-tag>
                      <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                      <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"  closable @close="removeRightById(scope.row, item3.id)">
                        {{ item3.authName }}
                      </el-tag>
                    </el-col>
                  </el-row>
                </el-col>
              </el-row>
            </template>
          </el-table-column>

          <!-- 索引列 -->
          <el-table-column type="index"></el-table-column>
          <el-table-column label="角色列表" prop="roleName"></el-table-column>
          <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
          <el-table-column label="操作" width="300px">
            <template slot-scope="scope">
              <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
              <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
              <el-button type="warning" icon="el-icon-setting" size="mini">分配权限</el-button>
            </template>
          </el-table-column>
        </el-table>
      </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 所有角色列表
      rolelist: []
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
       const { data: res } = await this.$http.get('roles')
       if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
       }
       this.rolelist = res.data
       console.log(this.rolelist)
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)

        if (confirmResult !== 'confirm') {
          return this.$message.info('取消了删除')
        }

        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败')
        }
        // this.getRolesList()
        role.children = res.data
    }
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
